Multiuser Immersive Virtual Reality (MIVR) tools democratize the design process by enabling equitable contributions from designers and non-designers. This fosters enhanced interdisciplinary cooperation and broadens participation, reflecting evolving and more inclusive landscape architectural practices. Our research focused on collaborative designers' and non-designers’ interaction in MIVR during the design process, from initial site analysis and conceptualization until the final proposal presentation. We gathered participants' insights during the three-month experiment, which mimicked a real design process. The results show that MIVR holds significant promise for enhancing collaboration and efficiency in the landscape architecture design process.